Two species of native corella that have reached pestilent proportions may soon be exterminated from the Busselton beachfront.
Busselton Shire councillor Bernie Masters says the corellas have been building up over the past decade, and he wants the WA Government to conduct a humane cull.
"For the last 10 years or so, one or more species of white cockatoo - corellas - have been found in the Busselton townsite in ever-increasing numbers," Cr Masters said.
"If they are exotic species from the eastern states that have escaped from aviaries or moved here from populations known to occur in the Perth metropolitan area, they pose significant risks to local species of parrots which use the same size and types of nesting hollows.
"They also pose a risk to some agricultural crops."
However, council officers have advised that most of the damage has been to tree species imported from eastern Australia - such as Norfolk Island pines and spotted gums.